Basil the Great was one of the most influential theologians of the fourth century and a central figure among the Cappadocian Fathers, playing a decisive role in defending Nicene orthodoxy against Arianism. Educated in the finest intellectual traditions of his era, he nonetheless embraced a more demanding vocation of prayer, ascetic discipline, and pastoral service—helping to shape monastic practice, shepherd the Church, and devote himself to works of mercy among the suffering. In early adulthood, influenced by his sister Macrina and convicted by Scripture, he turned from worldly ambition toward a life of repentance and wholehearted devotion to Christ. Basil is especially noteworthy for his remarkably clear statements on justification as resting not on human righteousness but on faith in Christ. In his homilies and doctrinal writings, he insists that boasting before God is excluded because salvation does not arise from personal virtue or moral achievement, but from entrusting oneself to Christ rather than one’s own merits. He contrasts confidence in works with confidence in Christ, teaching that the believer’s hope rests entirely on God’s grace received through faith, and that good works follow as the proper response to grace. Basil’s writings blaze with Trinitarian devotion and continue to strengthen the Church to this day.